Improvement in spring-beds



Improvement lih Spring `B'ds.

i"1t,.ented4 Novl 14, 1871.

No. 120,881.q

pawl c2 whereby to strain the stretcher.

JOHN JOHNSON, OF HARTFORD, CONNECTICUT.

IMPROVEMENT IN SPRING-BEDS.

Specification forming part of Letters Patent No. 120,881, dated November14, 1871.

To all whom it may concern:

Be it known that I, JOHN J OHNsON, of Hartford, in the county ofHartford and State of Counecticut, have invented certain new and usefulImprovements in Spring-Beds, of which the following is a specification,reference being had to the accompanying drawing, in Which- Figure l is acentral vertical longitudinal section of a bed-frame and stretcher withmy improvements attached.,

This invention is an improvement on the invention described and claimedin Letters Patent frr spring-bed granted to me August 15, A. D. 1 71.

a indicates the frame of the bed, at the head of which is pivoted, inthe standard b, the rocking end piece c, from both ends of which extendthe rocking arms c. The stretcherd is attached at one end to the rockingend piece c and at its foot to the roller e, which has a ratchet, el,and The rocking arms c overhang and rest upon the levers f, which arepivoted to the side rails of the bed and connected by the cross-piecef', which cross-piece bears a row of spiral or other springs, i, whichbear up against the stretcher, and the ei'ect of this arrangement issuch that the more pressure there is on the top of the stretcher thestronger the cross-piece j" will bear up against the stretcher, makingthereby a support for the middle of the stretcher which will adaptitself to the Weight upon the stretcher.

I claim as my inventionl. The equalizing frame, composed of the leversfand crosspiece f', pivoted to the bedframe, and operated upon by therocking arms c' or their equivalent, substantially in the manner and forthe purpose set forth.

2. In combination with said equa-lizing frame, pivoted as described, thesprings t and the stretcher d..

JOHN JOHNSON.

Witnesses WM. E. SIMONDs,

